Ratio = 200,000 / 10,000 = <<200000/10000=20>>20
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- A car with mass 1000 kg moving at 20 m/s. How many times greater is its kinetic energy than that of a 2 kg ball moving at 100 m/s?
- Car KE = 0.5×1000×400 = 200,000 J
- Ball KE = 0.5×2×10,000 = 10,000 J
- Yes.
- Now use that instead.
- A science educator compares kinetic energies: a 1000-kg car moving at 20 m/s and a 2-kg ball at 100 m/s. How many times greater is the car’s kinetic energy than the ball’s?
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